Experimental Polyurethane Foam Roofing Systems.
Technical rept. Jan 73-Oct 75,
CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF
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An experimental roofing installation is described in which polyurethane foam is spray-applied to metal Butler-type roofs and then coated with five different elastomeric coatings. The coating systems included a catalyzed silicone rubber, a moisture-curing silicone rubber, a hypalon mastic, and two catalyzed butyl-hypalons. Temperatures are recorded on top of the foam, on the metal roof deck, and in the building attics, reveal the insulating quality of the foam. Fuel usage before and after application of the foam is included - a natural gas savings of 53 is indicated after foaming. The performance of each of the five coating systems over a 22-month period is summarized. Best overall performance was observed with the silicone rubbers the poorest performance was with one of the catalyzed butyl-hypalons. Hail damage was observed on all of the coating systems except the silicones. Minor roof repairs that were done within the first year after installation are reported.
- Coatings, Colorants and Finishes
- Structural Engineering and Building Technology